Happy Holidays! We will be closed Dec 24-25 and Jan 1 to celebrate the Holidays and New Year's Day. 

4" Down the Hole Bits

Compatible Hammers Bits  
DHD340A SD4 TD40 MC42 MQ40
MP4H-DH X        
MP40-MQ         X
MP40-TD     X    
4HRSD   X      
Mincon MC40       X  
Atlas Copco DHD 4 STD X        
Atlas Copco COP44, COP44Q X        
Rockmore ROC4 X        
Bucyrus (Halco) Dominator 400 X        
NUMA Chamption 40 X        
Bulroc Hyper 41 X        
Puma 4.4 DHD340 X        
Sandvik SD4   X      
NUMA Challenger 4   X      
Bulroc Hyper 41-SD4   X      
Bucyrus (Halco) Mach 44-M   X      
Bucyrus (Halco) Dminator-M   X